1/* ------------------------------------------------------------------
2 * Copyright (C) 1998-2009 PacketVideo
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
13 * express or implied.
14 * See the License for the specific language governing permissions
15 * and limitations under the License.
16 * -------------------------------------------------------------------
17 */
18/****************************************************************************************
19Portions of this file are derived from the following 3GPP standard:
20
21    3GPP TS 26.173
22    ANSI-C code for the Adaptive Multi-Rate - Wideband (AMR-WB) speech codec
23    Available from http://www.3gpp.org
24
25(C) 2007, 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TTA, TTC)
26Permission to distribute, modify and use this file under the standard license
27terms listed above has been obtained from the copyright holder.
28****************************************************************************************/
29/*
30------------------------------------------------------------------------------
31
32
33
34 Pathname: ./src/pvamrwb_math_op.h
35
36     Date: 01/04/2007
37
38------------------------------------------------------------------------------
39 REVISION HISTORY
40
41 Description:
42------------------------------------------------------------------------------
43 INCLUDE DESCRIPTION
44
45------------------------------------------------------------------------------
46*/
47
48#ifndef PVAMRWB_MATH_OP_H
49#define PVAMRWB_MATH_OP_H
50
51
52/*----------------------------------------------------------------------------
53; INCLUDES
54----------------------------------------------------------------------------*/
55
56#include "pv_amr_wb_type_defs.h"
57
58/*----------------------------------------------------------------------------
59; DEFINES
60----------------------------------------------------------------------------*/
61
62/*----------------------------------------------------------------------------
63; MACROS
64; Define module specific macros here
65----------------------------------------------------------------------------*/
66
67/*----------------------------------------------------------------------------
68; EXTERNAL VARIABLES REFERENCES
69----------------------------------------------------------------------------*/
70#ifdef __cplusplus
71extern "C"
72{
73#endif
74
75
76    int32 one_ov_sqrt(      /* (o) Q31 : output value (range: 0<=val<1)         */
77        int32 L_x          /* (i) Q0  : input value  (range: 0<=val<=7fffffff) */
78    );
79    void one_ov_sqrt_norm(
80        int32 * frac,      /* (i/o) Q31: normalized value (1.0 < frac <= 0.5) */
81        int16 * exp        /* (i/o)    : exponent (value = frac x 2^exponent) */
82    );
83    int32 power_of_2(       /* (o) Q0  : result       (range: 0<=val<=0x7fffffff) */
84        int16 exponant,    /* (i) Q0  : Integer part.      (range: 0<=val<=30)   */
85        int16 fraction     /* (i) Q15 : Fractionnal part.  (range: 0.0<=val<1.0) */
86    );
87    int32 Dot_product12(    /* (o) Q31: normalized result (1 < val <= -1) */
88        int16 x[],         /* (i) 12bits: x vector                       */
89        int16 y[],         /* (i) 12bits: y vector                       */
90        int16 lg,          /* (i)    : vector length                     */
91        int16 * exp        /* (o)    : exponent of result (0..+30)       */
92    );
93
94
95    void amrwb_log_2(
96        int32 L_x,        /* (i) : input value                                 */
97        int16 *exponent,  /* (o) : Integer part of Log2.   (range: 0<=val<=30) */
98        int16 *fraction   /* (o) : Fractional part of Log2. (range: 0<=val<1)*/
99    );
100
101    void Lg2_normalized(
102        int32 L_x,         /* (i) : input value (normalized)                    */
103        int16 exp,         /* (i) : norm_l (L_x)                                */
104        int16 *exponent,   /* (o) : Integer part of Log2.   (range: 0<=val<=30) */
105        int16 *fraction    /* (o) : Fractional part of Log2. (range: 0<=val<1)  */
106    );
107
108
109    int16 mult_int16_r(int16 var1, int16 var2);          /* Mult with round, 2 */
110    int16 shr_rnd(int16 var1, int16 var2);         /* Shift right with round, 2  */
111
112    int16 div_16by16(int16 var1, int16 var2);       /* Short division,       18  */
113
114
115    void int32_to_dpf(int32 L_32, int16 *hi, int16 *lo);
116    int32 mpy_dpf_32(int16 hi1, int16 lo1, int16 hi2, int16 lo2);
117
118
119#define norm_s( x)    (normalize_amr_wb(  x) - 16)
120
121
122#define extract_h( x)    (int16)(x>>16)
123#define L_deposit_h( x)    (int32)(x<<16)
124
125
126#ifdef __cplusplus
127}
128#endif
129
130
131#endif /*  PVAMRWB_MATH_OP_H */
132
133